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Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions
11.9k
Companies
570
Updated
10.05.2026
11.9k Questions 570 Companies10.05.2026
PLTCHK testimonial
PLTCHK

"I got asked a hardcore MCM DP question and I saw it on PracHub as well. Solved that question in 5 minutes. Without PracHub I doubt I could solve it in 5 hours. Though somehow didn't get hired, perhaps I guess I solved it too fast? /s"

_The_TaNk_ testimonial
_The_TaNk_

"Believe me i'm a student here jn US. Recently interviewed for MSFT. They asked me exact question from PracHub. I saw it the night before and ignored it cause why waste time on random sites. I legit wanna go back and redo this whole thing if I had chance. Not saying will work for everyone but there is certainly some merit to that website. And i'm gonna use it in future prep from now on like lc tagged"

Chris testimonial
ChrisSenior SWE, LinkedIn

"10 years of experience but never worked at a top company. PracHub's senior-level questions helped me break into FAANG at 35. Age is just a number."

sleepy33 testimonial
sleepy33

"I was skeptical about the 'real questions' claim, so I put it to the test. I searched for the exact question I got grilled on at my last Meta onsite... and it was right there. Word for word."

Jake testimonial
JakeSenior ML Engineer, Lyft

"Got a Google recruiter call on Monday, interview on Friday. Crammed PracHub for 4 days. Passed every round. This platform is a miracle worker."

nuggetlord testimonial
nuggetlord

"I've used LC, Glassdoor, and random Discords. Nothing comes close to the accuracy here. The questions are actually current — that's what got me. Felt like I had a cheat sheet during the interview."

Carlos testimonial
CarlosFull Stack, Shopify

"The solution quality is insane. It covers approach, edge cases, time complexity, follow-ups. Nothing else comes close."

boba.tea.vibes testimonial
boba.tea.vibes

"Legit the only resource you need. TC went from 180k -> 350k. Just memorize the top 50 for your target company and you're golden."

Andy testimonial
AndySWE-II, Google

"PracHub Premium for one month cost me the price of two coffees a week. It landed me a $280K+ starting offer."

couchpotato99 testimonial
couchpotato99

"Literally just signed a $600k offer. I only had 2 weeks to prep, so I focused entirely on the company-tagged lists here. If you're targeting L5+, don't overthink it."

Shruti testimonial
ShrutiData Engineer, Salesforce

"Coaches and bootcamp prep courses cost around $200-300 but PracHub Premium is actually less than a Netflix subscription. And it landed me a $178K offer."

midnightramen testimonial
midnightramen

"I honestly don't know how you guys gather so many real interview questions. It's almost scary. I walked into my Amazon loop and recognized 3 out of 4 problems from your database."

Bianca testimonial
BiancaFrontend Eng, Figma

"Discovered PracHub 10 days before my interview. By day 5, I stopped being nervous. By interview day, I was actually excited to show what I knew."

tambrahm007 testimonial
tambrahm007

"I recently cleared Uber interviews (strong hire in the design round) and all the questions were present in prachub."

toa testimonial
toa

"The search is what sold me. I typed in a really niche DP problem I got asked last year and it actually came up, full breakdown and everything. These guys are clearly updating it constantly."

PLTCHK testimonial
PLTCHK

"I got asked a hardcore MCM DP question and I saw it on PracHub as well. Solved that question in 5 minutes. Without PracHub I doubt I could solve it in 5 hours. Though somehow didn't get hired, perhaps I guess I solved it too fast? /s"

_The_TaNk_ testimonial
_The_TaNk_

"Believe me i'm a student here jn US. Recently interviewed for MSFT. They asked me exact question from PracHub. I saw it the night before and ignored it cause why waste time on random sites. I legit wanna go back and redo this whole thing if I had chance. Not saying will work for everyone but there is certainly some merit to that website. And i'm gonna use it in future prep from now on like lc tagged"

Chris testimonial
ChrisSenior SWE, LinkedIn

"10 years of experience but never worked at a top company. PracHub's senior-level questions helped me break into FAANG at 35. Age is just a number."

sleepy33 testimonial
sleepy33

"I was skeptical about the 'real questions' claim, so I put it to the test. I searched for the exact question I got grilled on at my last Meta onsite... and it was right there. Word for word."

Jake testimonial
JakeSenior ML Engineer, Lyft

"Got a Google recruiter call on Monday, interview on Friday. Crammed PracHub for 4 days. Passed every round. This platform is a miracle worker."

nuggetlord testimonial
nuggetlord

"I've used LC, Glassdoor, and random Discords. Nothing comes close to the accuracy here. The questions are actually current — that's what got me. Felt like I had a cheat sheet during the interview."

Carlos testimonial
CarlosFull Stack, Shopify

"The solution quality is insane. It covers approach, edge cases, time complexity, follow-ups. Nothing else comes close."

boba.tea.vibes testimonial
boba.tea.vibes

"Legit the only resource you need. TC went from 180k -> 350k. Just memorize the top 50 for your target company and you're golden."

Andy testimonial
AndySWE-II, Google

"PracHub Premium for one month cost me the price of two coffees a week. It landed me a $280K+ starting offer."

couchpotato99 testimonial
couchpotato99

"Literally just signed a $600k offer. I only had 2 weeks to prep, so I focused entirely on the company-tagged lists here. If you're targeting L5+, don't overthink it."

Shruti testimonial
ShrutiData Engineer, Salesforce

"Coaches and bootcamp prep courses cost around $200-300 but PracHub Premium is actually less than a Netflix subscription. And it landed me a $178K offer."

midnightramen testimonial
midnightramen

"I honestly don't know how you guys gather so many real interview questions. It's almost scary. I walked into my Amazon loop and recognized 3 out of 4 problems from your database."

Bianca testimonial
BiancaFrontend Eng, Figma

"Discovered PracHub 10 days before my interview. By day 5, I stopped being nervous. By interview day, I was actually excited to show what I knew."

tambrahm007 testimonial
tambrahm007

"I recently cleared Uber interviews (strong hire in the design round) and all the questions were present in prachub."

toa testimonial
toa

"The search is what sold me. I typed in a really niche DP problem I got asked last year and it actually came up, full breakdown and everything. These guys are clearly updating it constantly."

Showing 20 results
OpenAI logo
OpenAI
Medium
Software Engineer

Clarify and Design Social-Graph Milestones

Clarify and Design Social-Graph Milestones An interview exercise progresses through a social graph with snapshots, a milestone for retrieving follower...

Software Engineering FundamentalsData Structure DesignGraphs
32
0
223 people solved
Jul 17, 2026
Wayfair logo
Wayfair
Medium
Applied Scientist

Rank Homepage Modules for an E-Commerce Product

Design a ranking system for modules on an e-commerce homepage. Candidate modules include trending products and seasonal or holiday sales. Focus on the...

ML System DesignMetrics & KPIsExperiment Design (A/B Testing)
0
0
5 people solved
Sep 10, 2026
Snowflake logo
Snowflake
Hard
Software Engineer

Build a Tiered Rate Limiter With Runtime-Updatable Limits, Then Test and Scale It

Build a rate limiting service in Python. Different clients can belong to different rate limit tiers, for example free, pro and enterprise. The limits ...

Software Engineering FundamentalsRate LimitingData Structure Design
1
0
11 people solved
Aug 5, 2026
Netflix logo
Netflix
Medium
Software Engineer Locked

Plan Eviction and Cleanup for a Production Cache

Turn a process-local timed cache into a production-ready component with bounded memory and request latency. Compare eviction and admission policies, c...

Software Engineering FundamentalsCaching
26
0
187 people solved
Jul 11, 2026
OpenAI logo
OpenAI
Hard
Machine Learning Engineer

Derive Backpropagation for Matrix-Product Layers

Consider a neural-network block whose output is produced by multiplying a sequence of trainable weight matrices together, then applying the resulting ...

Machine LearningNeural Networks & Training
69
0
799 people solved
Feb 5, 2026
Perplexity logo
Perplexity
Medium
Software Engineer

Design a CreditTracker with expirations

Design a CreditTracker class with three methods: ( 1) add_credit(start_time, end_time, credit), ( 2) subtract_credit(time, credit), and ( 3) check_cre...

Coding & AlgorithmsData Structure DesignHeaps & Priority Queues
38
0
336 people solved
Aug 10, 2025
Optiver logo
Optiver
Medium
Software Engineer

Design a satellite propagation simulator

Question Implement a SatelliteNetwork class that simulates message propagation over an undirected satellite graph. The class consumes a stream of inst...

Coding & AlgorithmsGraphs
106
0
808 people solved
Sep 6, 2025
Wells Fargo logo
Wells Fargo
Medium
Software EngineerSenior+

Build Spring Boot POST, PUT, and GET Endpoints

Build Spring Boot POST, PUT, and GET Endpoints The preserved prompt asks for Spring Boot endpoints using POST, PUT, and GET and tests knowledge of ann...

Software Engineering Fundamentals
1
0
16 people solved
Aug 19, 2026
Coinbase logo
Coinbase
Medium
Software Engineer

Fee-Maximizing Block Assembly from a Mempool with Child-Pays-For-Parent

In cryptocurrency mining, a miner places transactions into a candidate block. Each block has a fixed size B = 100. At any point in time, the transacti...

Software Engineering FundamentalsGreedyGraphs
3
0
26 people solved
May 8, 2026
Snowflake logo
Snowflake
Easy
Software Engineer

Answer conflict, tight deadline, and mentorship prompts

Behavioral Interview Prompts Answer the following with specific examples from your experience: 1. Conflict: Tell me about a time you had a conflict wi...

Behavioral & LeadershipConflict & CollaborationMentoring & Team Growth
17
0
248 people solved
Mar 1, 2026
OpenAI logo
OpenAI
Medium
Software Engineer Locked

Implement Social Follow Recommendations

This question evaluates graph data structure design and traversal, set-based aggregation and ranking logic, and the ability to justify data structure ...

Coding & Algorithms
15
0
112 people solved
May 9, 2026
Uber logo
Uber
Medium
Machine Learning EngineerSenior+

Find a Black-Box Convex Function Minimum

You are given access to a black-box function F(x): each call returns the function value at a real number x. You are also given a search interval [a, b...

Coding & Algorithms
3
0
74 people solved
Apr 19, 2026
Jane Street logo
Jane Street
Easy
Software Engineer

Design exchange–trading system message flow

Design the message contract and flow between a firm's trading system (OMS/EMS) and an external exchange. Assume: - The trading system sends orders and...

System DesignTrading SystemsDistributed Transactions & Idempotency
172
0
1192 people solved
Dec 15, 2025
OpenAI logo
OpenAI
Hard
Software Engineer

Design a Cloud DevBox Platform

Design a cloud DevBox platform: a service that gives developers disposable or persistent remote development machines, accessible through a browser, SS...

System DesignSystem Design FundamentalsSandboxing & Isolation
67
0
561 people solved
Apr 20, 2026
Remitly logo
Remitly
Medium
Staff AI-Native Engineer Locked

Build a Transfer-Fee Comparison Prototype

Build a transfer-fee comparison prototype for a corridor and amount using provider APIs, public web flows, or verified third-party data. Normalize exp...

System Design
4
0
43 people solved
Aug 6, 2026
Legora logo
Legora
Medium
Software Engineer Locked

Design a Scalable File Upload and Content Extraction Pipeline

Design an asynchronous file-upload and content-extraction system for a language-model workflow, including APIs, storage, queues, workers, retries, and...

System Design
10
0
78 people solved
Jun 22, 2026
OpenAI logo
OpenAI
Hard
Machine Learning Engineer

Debug transformer and train classifier

Debug and Fix a Transformer Text Classifier, Then Train and Evaluate It You inherit a small codebase for a transformer-based text classifier. It ships...

Machine LearningML CodingModel Evaluation
196
0
2295 people solved
Aug 4, 2025
OpenAI logo
OpenAI
Medium
Software Engineer Locked

Minimize deaths in spreading plant infection

This question evaluates a candidate's ability to model and simulate dynamic grid processes, reason about infection propagation and delayed state chang...

Coding & AlgorithmsSimulation & State Machines
107
0
1134 people solved
Apr 1, 2026
DoorDash logo
DoorDash
Medium
Software Engineer Locked

Validate a Shopping Cart

This question evaluates the ability to implement robust input and business-rule validation for shopping-cart items, including data integrity checks, i...

Coding & AlgorithmsData Cleaning & WranglingArrays & Strings
20
0
154 people solved
Jun 10, 2026
Amazon logo
Amazon
Hard
Software Engineer Locked

Design a Recursive File-Search API

Design a secure recursive file-search API with exact error messages, deterministic result ordering, explicit symbolic-link and permission policies, an...

Software Engineering FundamentalsAPI DesignApplication Security
16
0
146 people solved
Aug 11, 2026
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